osc/pt2pt: fix possible race in peer locking #2011
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It is possible for another thread to process a lock ack before the peer is set as locked. In this case either setting the locked or the eager active flag might clobber the other thread. To address this the flags have been made volatile and are set atomically. Since there is no a opal_atomic_or or opal_atomic_and function just use cmpset for now. Signed-off-by: Nathan Hjelm <hjelmn@lanl.gov>
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It is possible for another thread to process a lock ack before the
peer is set as locked. In this case either setting the locked or the
eager active flag might clobber the other thread. To address this the
flags have been made volatile and are set atomically. Since there is
no a opal_atomic_or or opal_atomic_and function just use cmpset for
now.
Signed-off-by: Nathan Hjelm hjelmn@lanl.gov